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The Force on a Current in a Magnetic Field

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Scholar
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Date Posted: 7/24/2008 1:52:30 PM  Status: Closed
The Force on a Current in a Magnetic Field
Course Textbook Chapter Problem
General Physics N/A N/A N/A
Question Details:
At New York City, the earth's magnetic field has a vertical component of 5.2 multiplied by 10-5 T that points downward (perpendicular to the ground) and a horizontal component of 1.8 multiplied by 10-5 T that points toward geographic north (parallel to the ground)> What is the magnitude and direction of the magnetic force on a 16.0 m long, straight wire that carries a current of 15 A perpendicularly out of the ground? 
  Magnitude Answer in N
Direction (east, west, north south)
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Date Posted: 7/24/2008 1:55:48 PM  Status: Live
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Response:
The B field perpendicular to the ground applies zero force to the current that is perpendicular to the ground.
 
The B field that is horizontal applies force of
 
   F  = L I B =   16.0 * 15 * 1.8 x 10-5   =    0.00432  Newtons
 
Direction?  Using right hand rule,   direction of force is   WEST
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